Key Words: Developing Media, Forces Vector, and Graphing The System of Forces

The objective of this instruction media developing is to produce an interactive instruction media of structur static using AutoCAD software. This media is going to be used as one of the learning sources for the students to define the resultant of forces fast, quickly, and accurately. This developing media adopt the model of dick and carey such as; ) identify the instructional goals, 2) conduct instructional analysis, 3) identifying entry behaviors and learner characteristics, 4) writing performance objectives, 5) developing criterion referenced test items, 6) developing instructional strategy, 7) developing and selecting instructional material, 8) designing and conducting the formative evaluation of instruction, 9) revising instruction, and 10) conducting summative evaluation. To find out the validity and the reliability of the product usable, conducted four stages of product testing such as; matery expert test, media expert test, learning design expert test, and small group test. The data is taken using quistonaires and analysed using qualitative descriptive in the form of percentage. This developing media produces an interactive instruction media and a printed out media. The result of evaluation is used to revise the instruction media. From the expert test and the small group test, it is found out the advantages and the disadvantages of the media. The advantages of the media are; 1) it can be used to graph the system of forces fast, quickly, and accurately, 2) it can display the exact dimension of things, and 3) it can motivate the critical thinking. While the disadvantages of the media is only be operated by the skilled person in AutoCAD software.